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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkPath.h"
namespace skiagm {
constexpr SkColor gPathColor = SK_ColorBLACK;
constexpr SkColor gClipAColor = SK_ColorBLUE;
constexpr SkColor gClipBColor = SK_ColorRED;
class ComplexClipGM : public GM {
public:
ComplexClipGM(bool aaclip, bool saveLayer, bool invertDraw)
: fDoAAClip(aaclip)
, fDoSaveLayer(saveLayer)
, fInvertDraw(invertDraw) {
this->setBGColor(0xFFDEDFDE);
}
protected:
SkString onShortName() {
SkString str;
str.printf("complexclip_%s%s%s",
fDoAAClip ? "aa" : "bw",
fDoSaveLayer ? "_layer" : "",
fInvertDraw ? "_invert" : "");
return str;
}
SkISize onISize() { return SkISize::Make(970, 780); }
virtual void onDraw(SkCanvas* canvas) {
SkPath path;
path.moveTo(SkIntToScalar(0), SkIntToScalar(50));
path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0));
path.lineTo(SkIntToScalar(175), SkIntToScalar(0));
path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25));
path.lineTo(SkIntToScalar(200), SkIntToScalar(150));
path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200));
path.lineTo(SkIntToScalar(0), SkIntToScalar(200));
path.close();
path.moveTo(SkIntToScalar(50), SkIntToScalar(50));
path.lineTo(SkIntToScalar(150), SkIntToScalar(50));
path.lineTo(SkIntToScalar(150), SkIntToScalar(125));
path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150));
path.lineTo(SkIntToScalar(50), SkIntToScalar(150));
path.close();
if (fInvertDraw) {
path.setFillType(SkPath::kInverseEvenOdd_FillType);
} else {
path.setFillType(SkPath::kEvenOdd_FillType);
}
SkPaint pathPaint;
pathPaint.setAntiAlias(true);
pathPaint.setColor(gPathColor);
SkPath clipA;
clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20));
clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22));
clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105));
clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177));
clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180));
clipA.close();
SkPath clipB;
clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10));
clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15));
clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190));
clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185));
clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100));
clipB.close();
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setTextSize(SkIntToScalar(20));
constexpr struct {
SkClipOp fOp;
const char* fName;
} gOps[] = { //extra spaces in names for measureText
{kIntersect_SkClipOp, "Isect "},
{kDifference_SkClipOp, "Diff " },
{kUnion_SkClipOp, "Union "},
{kXOR_SkClipOp, "Xor " },
{kReverseDifference_SkClipOp, "RDiff "}
};
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4);
if (fDoSaveLayer) {
// We want the layer to appear symmetric relative to actual
// device boundaries so we need to "undo" the effect of the
// scale and translate
SkRect bounds = SkRect::MakeLTRB(
4.0f/3.0f * -20,
4.0f/3.0f * -20,
4.0f/3.0f * (this->getISize().fWidth - 20),
4.0f/3.0f * (this->getISize().fHeight - 20));
bounds.inset(SkIntToScalar(100), SkIntToScalar(100));
SkPaint boundPaint;
boundPaint.setColor(SK_ColorRED);
boundPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundPaint);
canvas->saveLayer(&bounds, nullptr);
}
for (int invBits = 0; invBits < 4; ++invBits) {
canvas->save();
for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) {
this->drawHairlines(canvas, path, clipA, clipB);
bool doInvA = SkToBool(invBits & 1);
bool doInvB = SkToBool(invBits & 2);
canvas->save();
// set clip
clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType :
SkPath::kEvenOdd_FillType);
clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
SkPath::kEvenOdd_FillType);
canvas->clipPath(clipA, fDoAAClip);
canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip);
// In the inverse case we need to prevent the draw from covering the whole
// canvas.
if (fInvertDraw) {
SkRect rectClip = clipA.getBounds();
rectClip.join(path.getBounds());
rectClip.join(path.getBounds());
rectClip.outset(5, 5);
canvas->clipRect(rectClip);
}
// draw path clipped
canvas->drawPath(path, pathPaint);
canvas->restore();
SkScalar txtX = SkIntToScalar(45);
paint.setColor(gClipAColor);
const char* aTxt = doInvA ? "InvA " : "A ";
canvas->drawText(aTxt, strlen(aTxt), txtX, SkIntToScalar(220), paint);
txtX += paint.measureText(aTxt, strlen(aTxt));
paint.setColor(SK_ColorBLACK);
canvas->drawText(gOps[op].fName, strlen(gOps[op].fName),
txtX, SkIntToScalar(220), paint);
txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName));
paint.setColor(gClipBColor);
const char* bTxt = doInvB ? "InvB " : "B ";
canvas->drawText(bTxt, strlen(bTxt), txtX, SkIntToScalar(220), paint);
canvas->translate(SkIntToScalar(250),0);
}
canvas->restore();
canvas->translate(0, SkIntToScalar(250));
}
if (fDoSaveLayer) {
canvas->restore();
}
}
private:
void drawHairlines(SkCanvas* canvas, const SkPath& path,
const SkPath& clipA, const SkPath& clipB) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
const SkAlpha fade = 0x33;
// draw path in hairline
paint.setColor(gPathColor); paint.setAlpha(fade);
canvas->drawPath(path, paint);
// draw clips in hair line
paint.setColor(gClipAColor); paint.setAlpha(fade);
canvas->drawPath(clipA, paint);
paint.setColor(gClipBColor); paint.setAlpha(fade);
canvas->drawPath(clipB, paint);
}
bool fDoAAClip;
bool fDoSaveLayer;
bool fInvertDraw;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ComplexClipGM(false, false, false);)
DEF_GM(return new ComplexClipGM(false, false, true);)
DEF_GM(return new ComplexClipGM(false, true, false);)
DEF_GM(return new ComplexClipGM(false, true, true);)
DEF_GM(return new ComplexClipGM(true, false, false);)
DEF_GM(return new ComplexClipGM(true, false, true);)
DEF_GM(return new ComplexClipGM(true, true, false);)
DEF_GM(return new ComplexClipGM(true, true, true);)
}
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